Vacuum cleaning and dusting apparatus



G. 0. LEHMANN. VACUUM CLEANING AND nusmvs APPARATUS.

APPLICATION FILED MAY I8, 1922- Patented Sept. 19, 1922.

and

Patented Sept. 19, 192 2,

.UNlTED STATES PATENT orsics.

To all whom it may concern:

Be it known that I, Goa-rev Osoan LEI-I- mrm, engineer, at Seestrasse 44, Berlin, N., Germany, have invented certain new and useful Improvements in Vacuum Cleaning and Dusting Apparatus (for which I have'filed a plication in Germany, Feb. 21, 1921), of which the following is a specification.

Portable vacuum dusting and cleaning appliances are now'largely used in preference to stationary appliances for the same purpose, which are expensive to manufacture and operate. In so far as such portable appliances are modelled on the usual type of stationary appliance, differing only in that apparatus can be carried or wheeled about, the saving effected isnot great and the appliances are unwieldy. Moreover, they have hitherto-been found in practice to require considerable exertion for producing satisfac tory results, nee both hands of an adult operator to manip ate them.

The object of my invention is to provide a portable vacuum cleaner, comprising in a casing an electromotor, a fan, and a dust bag, havin the following advantages:

1. facilit of manipulation, so that it can be handled by a child if desired.

2. compactness, enabling it to operate under and behind chairs and like furniture.

3. Favorable distribution of weight.

4. Eflicient suction, equal to that of stationary appliances.

To this end I fix the handle to the motor frame, and make it span an arc of about 90, with one end fixed in line with the motor axis, or approximately so, and the other end abutting radially against the frame near the centre of gravity of the appliance. To save weight, I use a light casing, which has no heavy ortion of the apparatus to carry, but is itse f carried by the motor frame, and tapers towards the nozzle.

An appliance embodying the. invention is shown in the annexed drawin in which Fig. 1 is a longitudinal section of the same,

Fig. 2 a cross sectionon the line 11-11 of Fi 1. r

The shaft of the electromotor 7 has bearings at 9 and 10 in a frame 8, which comprises a circular part 11 surrounding the motor and supporting the same near the centre of vity of the appliance. Upon the motor s aft 12 there is mounted a 'twostage fan 13, so that this fan is also sup rted by the frame 8. A handle 14, spanning an arc of about 90 degrees, has one of its ends, designated 15, fixed at 16 to the frame 8, in the longitudinal axis of the appliance The other end of the handle, designated 17, abuts radiall against the circular frame part 11, and is xed to'the same by means of rivets, bolts or the like 18 (Fig. 2). The handle, motor and fan are thus combined to form a structure which supports the casing 19 of the appliance, which has a cap 20 at the end of a tapering part 21 enclosing the dust bag 22. As the casing 19, 21 has no heavy portions of the apparatus to support, and more particularly no rotating, vibrating portions, it can be made of light and thin material, for example sheet aluminium. Thus a considerabl saving of weight is effected, and the centre 'of avity is near the rear end, which is of consi erable advantage in manipulating the appliance.

Various methods of joining the handle to the motor frame may be adopted, the important feature being that the handle is not, as heretofore, joined to a casing supporting the motor and fan, but is joined to the motor frame, which sup orts the casing.

The cap 20 is xed by means of a coarse screw thread or bayonet joint, and makes a tight joint around the mouth of the dust bag. It has an inwardly directed coned socket 22, adapted-to receive the shank of the nozzle (not shown) or alternatively a tube (not shown) having at its forward end a socket for the nozzle. 4

As the handle is near the centre of gravit the appliance can easily be manipulated wit one hand, leaving the other hand vfree for Faking a brush or shifting furniture or the The motor is served in the usual way by means of a cable from a wall plug or lamp socket or the like, a switch being provided on the handle.

I claim:

A portable vacuum dusting and cleaning apparatus comprising an electromotor, a fan, i

a dust ba a casing and a, handle for manipulating t e appliance, characterized in that the handle is fixed directly to the frame of Berlin, Germany, this 28th day of April, the motor, spanning an arc of about 90 de- 1922. grees, and having one end fixed to the frame 1 i l 10 up rozkimately in line with the motor axis GUSTAV OSCAR LEHMANN 5 re ially near the centre of gravit of the In presence ofup lianee. E. Honnzmmnn,

he foregoing specification signed at R. T. ANSPAOE.

cmmcm'or Correction- It is hereby (mam that in 1mm Patent lfTo. 1,429,993, gum Septmnbar s, 1922, uimn tha 'application of Gusiav Oscar Iahmmn, of Berlin, Gummy, for u impronmcnt in Vacuum Cleaning and Dusting Apparatus, an error ap ears in thc printed specificaizion requiring ccrrection as follows: Page 2, line 4, infter the word axis insert the words and the othcr end abutting against the frame:

and that the said Letters Paumt'should be read with this correction therein that the same may conform to the rcco'rd of the cm in tho Patcnt Oflico.

Signed and sealed this am day f'ocmber, A. D., 1922.

[m] KARL FENHING, Am 0mm of Pam. 

